package com.example.yls.volley_picture;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.ImageRequest;
import com.android.volley.toolbox.NetworkImageView;
import com.android.volley.toolbox.Volley;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {
    private static final int GET_IMG =1001;
    private static final String TAG = "MainActivity";
    private Button btnHttp;
    private Button btn_imageRequest;
    private Button btn_imageLoader;
    private Button btn_net;
    private NetworkImageView net_img;
    private ImageView ivImg;
    private Handler handler;
    private MyImageCache myImageCache;

    private String imgUrl="http://jsxy.gdcp.cn/UploadFile/2/2019/3/15/2019315193634465.png";
    private RequestQueue requestQueue;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        requestQueue= Volley.newRequestQueue(MainActivity.this);
        myImageCache=new MyImageCache();

        btnHttp=findViewById(R.id.btn_http);
        ivImg=findViewById(R.id.iv_img);
        btn_imageRequest=findViewById(R.id.btn_imageRequest);
        btn_imageLoader=findViewById(R.id.btn_imageLoader);
        btn_net=findViewById(R.id.btn_net);
        net_img=findViewById(R.id.net_img);

        //加载图片方法四：NetWorkImageView
        btn_net.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ImageLoader imageLoader=new ImageLoader(requestQueue,myImageCache);
                net_img.setDefaultImageResId(R.drawable.zyl);
                net_img.setErrorImageResId(R.drawable.error);
                net_img.setImageUrl(imgUrl,imageLoader);
            }
        });

        //加载图片方法三：ImageLoader
        btn_imageLoader.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ImageLoader imageLoader=new ImageLoader(requestQueue,myImageCache);
                ImageLoader.ImageListener imageListener=ImageLoader.getImageListener(ivImg,
                        R.drawable.zyl,R.drawable.error);
                imageLoader.get(imgUrl,imageListener);
            }
        });

        //加载图片方法二：ImageRequest
        btn_imageRequest.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ImageRequest imageRequest=new ImageRequest(imgUrl,
                        new Response.Listener<Bitmap>() {
                            @Override
                            public void onResponse(Bitmap bitmap) {
                                ivImg.setImageBitmap(bitmap);
                            }
                        }, 0, 0, Bitmap.Config.ARGB_8888,
                        new Response.ErrorListener() {
                            @Override
                            public void onErrorResponse(VolleyError volleyError) {

                            }
                        });
                requestQueue.add(imageRequest);
            }
        });

        handler=new Handler(new Handler.Callback() {
            @Override
            public boolean handleMessage(Message message) {
                if(message.what==GET_IMG){
                    Bitmap bitmap= (Bitmap) message.obj;
                    ivImg.setImageBitmap(bitmap);
                }
                return false;
            }
        });

        //加载图片方法一：HttpUrlConnection
        btnHttp.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            URL url=new URL(imgUrl);
                            //需要消息机制
                            HttpURLConnection httpURLConnection= (HttpURLConnection) url.openConnection();
                            InputStream inputStream=httpURLConnection.getInputStream();
                            Bitmap bitmap= BitmapFactory.decodeStream(inputStream);
                            //将图片通过消息发出去
                            Message message=Message.obtain();
                            message.what=GET_IMG;
                            message.obj=bitmap;
                            handler.sendMessage(message);
                        } catch (MalformedURLException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }).start();
            }
        });
    }
}
